That ' (not with my 30ft trailer)' is key. Most posters, when asking about a route, are planning to drive it their trailer or RV. They aren't asking whether the road is difficult in their Wrangler toad. They want to know whether to drive it with the 40ft RV towing the Wrangler.
Often, though not always, OP mention the size of their RV, or its in their sig. They may also mention personal difficulties, like a passenger who gets vertigo when looking over the road's edge from the elevated position in WyoTraveler's Monarch.
